Yeshua, the Jewish Messiah, prophetically fulfilled the spring feasts. He will prophetically fulfill the fall feasts in a future year.

Passover, Nisan 14, Yeshua, the Passover Lamb, was crucified on Passover to atone for sin.
Feast of Unleavened Bread, Nisan 15-21, Unleavened Bread is the time of Yeshua’s burial. He was unleavened and sin-free.
Feast of Firstfruits, Nisan 17, Yeshua rose from the dead on the Feast of Firstfruits as the firstfruits of the dead (1 Cor. 15:20).
Feast of Weeks, Sivan 5-6, Yeshua said God would send the disciples a gift. Just as He said, He sent the Holy Spirit to the Upper Room on this feast day.
Fall feasts
Feast of Trumpets, Tishri 1, Points to the future resurrection of the dead because they rise at the last trumpet.
Day of Atonement, Tishri 10. Suggests a future judgment when Yeshua, the High Priest, intercedes for believers.
Feast of Tabernacle, Tishri 15-21. Indicates a future millennium when Yeshua will tabernacle on earth to rule and reign.